HD 114386 is a star with a pair of orbiting exoplanets in the southern constellation of Centaurus. It has an apparent visual magnitude of 8.73,[2] which means it cannot be viewed with the naked eye but can be seen with a telescope or good binoculars. Based on parallax measurements, the system is located at a distance of 91 light years from the Sun. It is receding with a radial velocity of 33.4 km/s.[3] The star shows a high proper motion, traversing the celestial sphere at an angular rate of 0.318 arcsec yr−1.[7]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 13h 10m 39.824s[1] |
| Declination | −35° 03′ 17.21″[1] |
| Apparent magnitude (V) | 8.73[2] |
| Characteristics | |
| Spectral type | K3 V[2] |
| B−V color index | 0.982[2] |
| Astrometry | |
| Radial velocity (Rv) | 33.350±0.0004[3] km/s |
| Proper motion (μ) | RA: −137.143 mas/yr[1] Dec.: −324.874 mas/yr[1] |
| Parallax (π) | 35.7355 ± 0.0200 mas[1] |
| Distance | 91.27 ± 0.05 ly (27.98 ± 0.02 pc) |
| Absolute magnitude (MV) | 6.49[2] |
| Details | |
| Mass | 0.76±0.01[4] M☉ |
| Radius | 0.73±0.01[4] R☉ |
| Luminosity | 0.28±0.01[4] L☉ |
| Surface gravity (log g) | 4.58±0.02[4] cgs |
| Temperature | 4,926±13[4] K |
| Metallicity [Fe/H] | −0.012[5] dex |
| Rotational velocity (v sin i) | 3.06[5] km/s |
| Age | 8.8±2.8[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The spectrum of HD 114386 yields a stellar classification of K3 V,[2] matching a K-type main-sequence star, or orange dwarf. It has 76% of the mass of the Sun and 73% of the Sun's radius. HD 114386 is a much older star than the Sun with an estimated age of roughly nine billion years.[4] The abundance of iron in the stellar atmosphere, a measure of the star's metallicity, is nearly solar.[5] It is rather dim compared to the Sun, radiating just 28% of the luminosity of the Sun from its photosphere at an effective temperature of 4,926 K.[4]
Planetary system
In 2004, the Geneva Extrasolar Planet Search Team announced the discovery of an extrasolar planet orbiting the star.[2] The preliminary data for a second exoplanet was released in 2011.[8]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.37 MJ | 1.65[9] | 445 | 0.12 | — | — |
| c | ≥1.19 MJ | – | 1,046 | 0.06 | — | — |